Transformation of human mesenchymal cells and skin fibroblasts into hematopoietic cells.

Transformation of human mesenchymal cells and skin fibroblasts into hematopoietic cells.
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DOI:
10.1371/journal.pone.0021250
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Estrov Z
Estrov Z
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Harris DM;Hazan-Haley I;Coombes K;Bueso-Ramos C;Liu J;Liu Z;Li P;Ravoori M;Abruzzo L;Han L;Singh S;Sun M;Kundra V;Kurzrock R;Estrov Z

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长期骨髓抑制的患者需要频繁的血小板输注和偶尔的粒细胞输注。多供体输血诱导同种异体免疫,从而增加发病率和死亡率。因此,需要自体或hla匹配的同种异体血小板和粒细胞来源。为了确定非造血细胞是否可以重编程为造血细胞,我们将人间充质基质细胞(MSCs)和皮肤成纤维细胞与去甲基化剂5-氮杂胞苷(Aza)、生长因子(GF)粒细胞-巨噬细胞集落刺激因子和干细胞因子一起培养。这种治疗将MSCs转化为表达T-、B-、骨髓或干细胞/祖细胞标记的圆形非贴壁细胞。将转化后的细胞作为造血细胞植入免疫缺陷小鼠骨髓。DNA甲基化和mRNA阵列分析表明,Aza和GF处理使HOXB基因去甲基化和活化。确实,转染了HOXB4、HOXB5和HOXB2基因的间充质干细胞或皮肤成纤维细胞将它们转化为造血细胞。需要进一步的研究来确定转化的间充质干细胞或皮肤成纤维细胞是否适合治疗。
Patients with prolonged myelosuppression require frequent platelet and occasional granulocyte transfusions. Multi-donor transfusions induce alloimmunization, thereby increasing morbidity and mortality. Therefore, an autologous or HLA-matched allogeneic source of platelets and granulocytes is needed. To determine whether nonhematopoietic cells can be reprogrammed into hematopoietic cells, human mesenchymal stromal cells (MSCs) and skin fibroblasts were incubated with the demethylating agent 5-azacytidine (Aza) and the growth factors (GF) granulocyte-macrophage colony-stimulating factor and stem cell factor. This treatment transformed MSCs to round, non-adherent cells expressing T-, B-, myeloid-, or stem/progenitor-cell markers. The transformed cells engrafted as hematopoietic cells in bone marrow of immunodeficient mice. DNA methylation and mRNA array analysis suggested that Aza and GF treatment demethylated and activated HOXB genes. Indeed, transfection of MSCs or skin fibroblasts with HOXB4, HOXB5, and HOXB2 genes transformed them into hematopoietic cells. Further studies are needed to determine whether transformed MSCs or skin fibroblasts are suitable for therapy.
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